Cisco 1605-R How To Use Manual page 70

1-Port T1/FT1 DSU/CSU Card
Figure 3-21
Table 3-5
Feature
LP LED
AL LED
CD LED
3-22 Cisco WAN Interface Cards Hardware Installation Guide
T1/FT1 Card—Front Panel
T1 port
LOOP
BACK
SEE MANUAL
BEFORE
INSTALLATION
LP AL CD
T1 DSU/CSU
Loopback
CD
LP
button
AL
T1/FT1 Card LEDs and Button
Color
Yellow
Off
Red
Yellow
Blue
Off
Green
DSU
CSU
T1
Description
Line or loopback state is detected or is
manually set by the user.
Normal operation.
No receive signal.
Remote station has an alarm condition.
The remote station is probably out of
service. If the remote station is an
IOS-based router, its interface may be
shut down.
Normal operation.
Internal DSU/CSU in the WAN
interface card is communicating with
another DSU/CSU. This LED is on
during normal operation.